/*- * Copyright (c) 2001 Takanori Watanabe * Copyright (c) 2001-2012 Mitsuru IWASAKI * Copyright (c) 2003 Peter Wemm * Copyright (c) 2008-2012 Jung-uk Kim * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include __FBSDID("$FreeBSD: stable/10/sys/x86/acpica/acpi_wakeup.c 331910 2018-04-03 07:52:06Z avg $"); #ifdef __i386__ #include "opt_npx.h" #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef SMP #include #include #include #endif #include #include #include "acpi_wakecode.h" #include "acpi_wakedata.h" /* Make sure the code is less than a page and leave room for the stack. */ CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024); extern int acpi_resume_beep; extern int acpi_reset_video; #ifdef SMP extern struct susppcb **susppcbs; static cpuset_t suspcpus; #else static struct susppcb **susppcbs; #endif static void *acpi_alloc_wakeup_handler(void); static void acpi_stop_beep(void *); #ifdef SMP static int acpi_wakeup_ap(struct acpi_softc *, int); static void acpi_wakeup_cpus(struct acpi_softc *); #endif #ifdef __amd64__ #define ACPI_PAGETABLES 3 #else #define ACPI_PAGETABLES 0 #endif #define WAKECODE_VADDR(sc) \ ((sc)->acpi_wakeaddr + (ACPI_PAGETABLES * PAGE_SIZE)) #define WAKECODE_PADDR(sc) \ ((sc)->acpi_wakephys + (ACPI_PAGETABLES * PAGE_SIZE)) #define WAKECODE_FIXUP(offset, type, val) do { \ type *addr; \ addr = (type *)(WAKECODE_VADDR(sc) + offset); \ *addr = val; \ } while (0) static void acpi_stop_beep(void *arg) { if (acpi_resume_beep != 0) timer_spkr_release(); } #ifdef SMP static int acpi_wakeup_ap(struct acpi_softc *sc, int cpu) { struct pcb *pcb; int vector = (WAKECODE_PADDR(sc) >> 12) & 0xff; int apic_id = cpu_apic_ids[cpu]; int ms; pcb = &susppcbs[cpu]->sp_pcb; WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb); WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit); WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base); ipi_startup(apic_id, vector); /* Wait up to 5 seconds for it to resume. */ for (ms = 0; ms < 5000; ms++) { if (!CPU_ISSET(cpu, &suspended_cpus)) return (1); /* return SUCCESS */ DELAY(1000); } return (0); /* return FAILURE */ } #define WARMBOOT_TARGET 0 #define WARMBOOT_OFF (KERNBASE + 0x0467) #define WARMBOOT_SEG (KERNBASE + 0x0469) #define CMOS_REG (0x70) #define CMOS_DATA (0x71) #define BIOS_RESET (0x0f) #define BIOS_WARM (0x0a) static void acpi_wakeup_cpus(struct acpi_softc *sc) { uint32_t mpbioswarmvec; int cpu; u_char mpbiosreason; /* save the current value of the warm-start vector */ mpbioswarmvec = *((uint32_t *)WARMBOOT_OFF); outb(CMOS_REG, BIOS_RESET); mpbiosreason = inb(CMOS_DATA); /* setup a vector to our boot code */ *((volatile u_short *)WARMBOOT_OFF) = WARMBOOT_TARGET; *((volatile u_short *)WARMBOOT_SEG) = WAKECODE_PADDR(sc) >> 4; outb(CMOS_REG, BIOS_RESET); outb(CMOS_DATA, BIOS_WARM); /* 'warm-start' */ /* Wake up each AP. */ for (cpu = 1; cpu < mp_ncpus; cpu++) { if (!CPU_ISSET(cpu, &suspcpus)) continue; if (acpi_wakeup_ap(sc, cpu) == 0) { /* restore the warmstart vector */ *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec; panic("acpi_wakeup: failed to resume AP #%d (PHY #%d)", cpu, cpu_apic_ids[cpu]); } } /* restore the warmstart vector */ *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec; outb(CMOS_REG, BIOS_RESET); outb(CMOS_DATA, mpbiosreason); } #endif int acpi_sleep_machdep(struct acpi_softc *sc, int state) { ACPI_STATUS status; struct pcb *pcb; if (sc->acpi_wakeaddr == 0ul) return (-1); /* couldn't alloc wake memory */ #ifdef SMP suspcpus = all_cpus; CPU_CLR(PCPU_GET(cpuid), &suspcpus); #endif if (acpi_resume_beep != 0) timer_spkr_acquire(); AcpiSetFirmwareWakingVector(WAKECODE_PADDR(sc), 0); intr_suspend(); pcb = &susppcbs[0]->sp_pcb; if (savectx(pcb)) { #ifdef __amd64__ fpususpend(susppcbs[0]->sp_fpususpend); #elif defined(DEV_NPX) npxsuspend(susppcbs[0]->sp_fpususpend); #endif #ifdef SMP if (!CPU_EMPTY(&suspcpus) && suspend_cpus(suspcpus) == 0) { device_printf(sc->acpi_dev, "Failed to suspend APs\n"); return (0); /* couldn't sleep */ } #endif WAKECODE_FIXUP(resume_beep, uint8_t, (acpi_resume_beep != 0)); WAKECODE_FIXUP(reset_video, uint8_t, (acpi_reset_video != 0)); #ifndef __amd64__ WAKECODE_FIXUP(wakeup_cr4, register_t, pcb->pcb_cr4); #endif WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb); WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit); WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base); /* Call ACPICA to enter the desired sleep state */ if (state == ACPI_STATE_S4 && sc->acpi_s4bios) status = AcpiEnterSleepStateS4bios(); else status = AcpiEnterSleepState(state); if (ACPI_FAILURE(status)) { device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status)); return (0); /* couldn't sleep */ } for (;;) ia32_pause(); } else { #ifdef __amd64__ fpuresume(susppcbs[0]->sp_fpususpend); #elif defined(DEV_NPX) npxresume(susppcbs[0]->sp_fpususpend); #endif } return (1); /* wakeup successfully */ } int acpi_wakeup_machdep(struct acpi_softc *sc, int state, int sleep_result, int intr_enabled) { if (sleep_result == -1) return (sleep_result); if (!intr_enabled) { /* Wakeup MD procedures in interrupt disabled context */ if (sleep_result == 1) { pmap_init_pat(); initializecpu(); PCPU_SET(switchtime, 0); PCPU_SET(switchticks, ticks); #ifdef SMP if (!CPU_EMPTY(&suspcpus)) acpi_wakeup_cpus(sc); #endif } #ifdef SMP if (!CPU_EMPTY(&suspcpus)) resume_cpus(suspcpus); #endif mca_resume(); #ifdef __amd64__ if (vmm_resume_p != NULL) vmm_resume_p(); #endif intr_resume(/*suspend_cancelled*/false); AcpiSetFirmwareWakingVector(0, 0); } else { /* Wakeup MD procedures in interrupt enabled context */ if (sleep_result == 1 && mem_range_softc.mr_op != NULL && mem_range_softc.mr_op->reinit != NULL) mem_range_softc.mr_op->reinit(&mem_range_softc); } return (sleep_result); } static void * acpi_alloc_wakeup_handler(void) { void *wakeaddr; int i; /* * Specify the region for our wakeup code. We want it in the low 1 MB * region, excluding real mode IVT (0-0x3ff), BDA (0x400-0x4ff), EBDA * (less than 128KB, below 0xa0000, must be excluded by SMAP and DSDT), * and ROM area (0xa0000 and above). The temporary page tables must be * page-aligned. */ wakeaddr = contigmalloc((ACPI_PAGETABLES + 1) * PAGE_SIZE, M_DEVBUF, M_WAITOK, 0x500, 0xa0000, PAGE_SIZE, 0ul); if (wakeaddr == NULL) { printf("%s: can't alloc wake memory\n", __func__); return (NULL); } if (EVENTHANDLER_REGISTER(power_resume, acpi_stop_beep, NULL, EVENTHANDLER_PRI_LAST) == NULL) { printf("%s: can't register event handler\n", __func__); contigfree(wakeaddr, (ACPI_PAGETABLES + 1) * PAGE_SIZE, M_DEVBUF); return (NULL); } susppcbs = malloc(mp_ncpus * sizeof(*susppcbs), M_DEVBUF, M_WAITOK); for (i = 0; i < mp_ncpus; i++) { susppcbs[i] = malloc(sizeof(**susppcbs), M_DEVBUF, M_WAITOK); susppcbs[i]->sp_fpususpend = alloc_fpusave(M_WAITOK); } return (wakeaddr); } void acpi_install_wakeup_handler(struct acpi_softc *sc) { static void *wakeaddr = NULL; #ifdef __amd64__ uint64_t *pt4, *pt3, *pt2; int i; #endif if (wakeaddr != NULL) return; wakeaddr = acpi_alloc_wakeup_handler(); if (wakeaddr == NULL) return; sc->acpi_wakeaddr = (vm_offset_t)wakeaddr; sc->acpi_wakephys = vtophys(wakeaddr); bcopy(wakecode, (void *)WAKECODE_VADDR(sc), sizeof(wakecode)); /* Patch GDT base address, ljmp targets. */ WAKECODE_FIXUP((bootgdtdesc + 2), uint32_t, WAKECODE_PADDR(sc) + bootgdt); WAKECODE_FIXUP((wakeup_sw32 + 2), uint32_t, WAKECODE_PADDR(sc) + wakeup_32); #ifdef __amd64__ WAKECODE_FIXUP((wakeup_sw64 + 1), uint32_t, WAKECODE_PADDR(sc) + wakeup_64); WAKECODE_FIXUP(wakeup_pagetables, uint32_t, sc->acpi_wakephys); #endif /* Save pointers to some global data. */ WAKECODE_FIXUP(wakeup_ret, void *, resumectx); #ifndef __amd64__ #if defined(PAE) || defined(PAE_TABLES) WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdpt)); #else WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdir)); #endif #else /* Build temporary page tables below realmode code. */ pt4 = wakeaddr; pt3 = pt4 + (PAGE_SIZE) / sizeof(uint64_t); pt2 = pt3 + (PAGE_SIZE) / sizeof(uint64_t); /* Create the initial 1GB replicated page tables */ for (i = 0; i < 512; i++) { /* * Each slot of the level 4 pages points * to the same level 3 page */ pt4[i] = (uint64_t)(sc->acpi_wakephys + PAGE_SIZE); pt4[i] |= PG_V | PG_RW | PG_U; /* * Each slot of the level 3 pages points * to the same level 2 page */ pt3[i] = (uint64_t)(sc->acpi_wakephys + (2 * PAGE_SIZE)); pt3[i] |= PG_V | PG_RW | PG_U; /* The level 2 page slots are mapped with 2MB pages for 1GB. */ pt2[i] = i * (2 * 1024 * 1024); pt2[i] |= PG_V | PG_RW | PG_PS | PG_U; } #endif if (bootverbose) device_printf(sc->acpi_dev, "wakeup code va %#jx pa %#jx\n", (uintmax_t)sc->acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys); }